Adhyaya 89: शौचाचारलक्षणम् — सदाचार, भैक्ष्यचर्या, प्रायश्चित्त, द्रव्यशुद्धि, आशौच-निर्णय
चतुर्थ्यां स्त्री न गम्या तु गतो ऽल्पायुः प्रसूयते विद्याहीनं व्रतभ्रष्टं पतितं पारदारिकम्
caturthyāṃ strī na gamyā tu gato 'lpāyuḥ prasūyate vidyāhīnaṃ vratabhraṣṭaṃ patitaṃ pāradārikam
चतुर्थ्यां स्त्री न गम्या; तत्र गमनात् अल्पायुः प्रसूयते—विद्याहीनो व्रतभ्रष्टः पतितः पारदारिकश्च; एष पाशबन्धो वर्धते, यः पशोः पतिं शिवं प्रति गतिं निरुणद्धि।
Suta Goswami (narrating traditional dharma-niyamas within the Linga Purana discourse)
It frames sexual restraint on specific tithis as a supporting limb (aṅga) of Śiva-pūjā and vrata, protecting ritual purity and steadiness of mind for Linga-upāsanā.
By implication, Śiva as Pati is the liberating Lord, while violations of niyama intensify pāśa (bondage) for the paśu (individual soul), delaying fitness for Śiva’s grace.
Vrata-based brahmacarya (sexual restraint) aligned to lunar tithis—an ethical discipline that supports Pāśupata-oriented purification and steadiness for Śiva-pūjā.